JP2002004090A - Apparatus for transporting object to be treated and surface treatment method using the apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a transfer apparatus for a surface-treated object, which can transfer and swing and rotate a work by an easy mechanism, and can easily adjust a line tact of a process. A hanger (12) includes a pair of rack rollers (3).
0, and swings and rotates the hanger 12 at an arbitrary timing, for example, while moving between the processing tanks or while loading or lifting the hanger 12 into the processing tank. Further, since the sprocket 28 formed on the swing shaft 26 of the hanger 12 is sandwiched by the pair of rack rollers 30, the hanger 12 can be opened in the processing tank. Therefore, if necessary, only the hanger 12 can be left in the processing tank and transferred to another hanger 12 for transportation, so that the swing timing of the hanger 12 and the selection of the object to be transported can be easily performed, The line tact of the process can be adjusted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for transferring a surface-treated object and a surface treatment method using the device, and more particularly to a surface treatment between a plurality of surface treatment tanks arranged in an immersion type surface treatment step. The present invention relates to a transfer device for transferring an object and an improvement in a surface treatment method using the transfer device.

[0002]

2. Description of the Related Art Conventionally, a machined part, for example, a housing of an electric transformer (hereinafter referred to as a work) is coated on its surface (electro-deposition coating) for the purpose of improving corrosion resistance and improving design. Or baked paint, or other paints such as oil-based or water-based paints. When coating a workpiece, a dipping method is generally used because it is easy to form a uniform coating film in a relatively short time. This immersion method is performed by sequentially immersing the work in a treatment tank filled with a surface treatment liquid such as electrodeposition coating. In addition, when actually painting the work, it is necessary to perform a pre-treatment in order to wash and remove oil components attached in advance during machining of the work or to apply the paint satisfactorily. A cleaning step is also required between treatments. Therefore, in the processing tank, a plurality of washing tanks, degreasing tanks, chemical conversion tanks, and the like are arranged in addition to the coating processing tanks, and the work is sequentially transferred between the processing tanks to perform each surface treatment.

[0003] For example, when an electrodeposition coating is applied to a work, pre-washing, degreasing, first washing, surface conditioning, chemical conversion treatment, second washing, pure water washing, electrodeposition coating, first filtrate washing, second filtrate washing, and the like are given as examples. Surface treatment is performed in the order of washing with a filtrate, washing with pure water and the like. In addition, degreasing removes oil, dust, dust, etc. on the work surface, surface conditioning is a treatment for densifying the phosphate film, and chemical conversion treatment forms a corrosion-resistant phosphate film. Each washing is performed for the purpose of removing an excessively applied treatment liquid, washing away a treatment agent, and the like.

As described above, when a plurality of processing tanks are continuously arranged, the work is suspended by, for example, an overhead conveyor or the like, moves between the processing tanks, and the work moves onto the processing tank. When immersed, it is immersed in the processing tank. At this time, if the work has a bottomed container shape as in the case of the electric transformer housing as described above, depending on the immersion angle of the work, the treatment liquid resistance at the time of immersion increases, or the treatment liquid is subjected to the next treatment. It is pumped out to the tank, or a part where the processing liquid does not come into contact at all is generated. For example, when the workpiece is loaded upside down (with the container open end down) during immersion, air remains in the container, and the processing liquid does not contact the air layer at all. Conversely, when the workpiece is lifted from the processing tank with the open end thereof facing upward, the processing liquid is pumped out of the processing tank. Therefore, there is known a method of transporting a work in which the angle is changed by rotating the work when the work is put into a processing tank or when the work is lifted, thereby preventing the formation of an air layer and the pumping out of a processing liquid.

[0005]

However, the rotation of the work is generally performed when the work is immersed in the treatment tank or when the work is lifted. Therefore, the rotation of the work
Since the process is performed after the movement of the work between the processing tanks is completed and before the movement of the work is started, there is a problem that a reduction in the line tact of the processing process is hindered. In addition, since the work needs to be suspended and further rotated, the mechanism tends to be complicated. Further, as described above, since the surface treatment of the workpiece passes through various processes, various types of processing liquids adhere to the mechanism, which may result in drive failure, particularly in which a desired rotation angle cannot be secured. Therefore, it is desirable that the rotating mechanism be as simple as possible. Further, depending on the processing content, the work may be immersed in the processing tank for a long time, but when the suspension mechanism of the work, the transport mechanism, and the rotation mechanism are integrated,
During the immersion of the work, the transport mechanism itself needs to be stopped, and there is a problem that it is difficult to balance the processing tact with other processing steps.

[0006] Further, a transfer device for transferring a work in a processing tank group in which a plurality of processing tanks are continuously arranged is sequentially moved, and when a series of processing is completed, the transfer device must return to the beginning of the processing step. No. Usually, when such a transfer device is turned back, it is necessary to form a round trajectory.In this case, however, a return trajectory in which the transfer device moves in a non-processed state is required outside the processing tank group. There is a problem that the required space increases and the configuration of the equipment is not preferable.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to make it possible to transfer and swing a work by a simple mechanism, and to easily adjust a line tact in a process. The object of the present invention is to provide a device for conveying a surface-treated object that can be performed. Another object of the present invention is to provide a surface treatment method using a transfer device capable of reducing a required space for a treatment step.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides an apparatus for conveying a surface-treated object which moves between a plurality of arranged surface treatment tanks while performing surface treatment on the surface-treated object. A transport frame that can freely move between the surface treatment tanks, a lifter that is disposed in the transport frame and that can be immersed in the surface treatment tank, and a hanger detachably supported by the lifter. A hanger that fixedly supports the object to be surface-treated and is swingable about a swing axis substantially perpendicular to a moving direction of the transfer frame, and is disposed with the swing axis interposed therebetween. A pair of swing means for rotating the swing shaft by a predetermined angle.

According to this structure, since the hanger is sandwiched by the pair of swinging means, the structure for swinging is simple, and the hanger can be smoothly swung. Further, the hanger can be swung at an arbitrary timing, for example, while moving between the surface treatment tanks or while the hanger is immersed or pulled up in the surface treatment tanks. Further, since the pair of swinging means can disengage the swinging shaft from the swinging shaft, only the hanger can be left in the surface treatment tank. The transport frame including the moving means can be engaged in transporting another hanger. As a result, the swing timing of the hanger and the selection of the transfer target can be easily performed, and the line tact of the process can be easily adjusted.

In order to achieve the above object, according to the present invention, in the above structure, the swing shaft of the hanger has a sprocket, and the swing means is constituted by a rack roller which can mesh with the sprocket. It is characterized by being.

According to this structure, the hanger can be easily swung and released from the swing state.

In order to achieve the above object, the present invention is characterized in that, in the above-mentioned configuration, the oscillating means can be moved toward and away from an oscillating shaft.

According to this configuration, the hanger can be easily released from the swinging state and returned to the swingable state again.

In order to achieve the above object, the present invention is characterized in that, in the above configuration, the hanger is supported by a hanger hook provided on the lifter when swinging.

According to this configuration, the swing of the hanger can be stably performed.

In order to achieve the above object, the present invention is characterized in that, in the above configuration, the swing means can fix the swing angle of the hanger to an arbitrary angle.

According to this configuration, it is possible to immerse or lift the surface-treated object in the surface treatment tank in an optimum posture according to the shape of the surface-treated object and a required processing state.

In order to achieve the above object, the present invention provides a surface treatment method using the transport device having the above-mentioned structure, wherein the predetermined surface on the downstream side of a treatment tank group formed by a plurality of arranged surface treatment tanks is provided. Conveying the surface treatment object while performing the surface treatment to the treatment tank, releasing the hanger from the lifter in the predetermined surface treatment tank, and immersing the surface treatment object in the predetermined surface treatment tank together with the hanger, Returning the transport device with the hanger released to the upstream side of the processing tank group, pulling up the hanger on which the subsequent surface treatment object is placed, and transporting the hanger to the downstream side while performing the surface treatment; and The hanger on which the surface-treated object left immersed is placed is pulled up by a different transport device that has released the hanger returned from the downstream side of the processing tank group, and the surface-treated object to the predetermined surface processing tank on the downstream side. Carrying out surface treatment while carrying out surface treatment, and performing surface treatment while carrying the object to be treated from the upstream side to the downstream side of the group of treatment tanks while transferring hangers by sequentially using different transfer devices between predetermined treatment tanks. It is characterized by applying.

According to this configuration, the transport device transports the hangers on which the workpieces are mounted while sequentially transferring the hangers while reciprocating in a predetermined section, so that the return track for the transport device is located outside the processing tank group. , The processing step can be constructed on one line.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention (hereinafter referred to as embodiments) will be described below with reference to the drawings. FIG. 1 shows an overall configuration diagram of a transport device 10 of the present embodiment. FIG. 2 shows a state in which many other mechanical parts are removed, leaving a hanger 12 (for example, a frame-type structure formed of a metal steel material) on which a surface-treated object (hereinafter, referred to as a workpiece W) is placed. It is shown. In this embodiment,
The workpiece W is, for example, a housing of an electric transformer (see FIG. 4). In order to apply an electrodeposition coating to the surface, for example, preliminary washing, degreasing, first washing, surface adjustment, chemical conversion, Surface treatment is performed in the order of water washing, pure water washing, electrodeposition coating, first filtrate washing, second filtrate washing, pure water washing and the like. The transport device 10 sequentially moves between surface treatment tanks (hereinafter, simply referred to as treatment tanks) filled with a treatment liquid to be treated in order to perform the above-described respective treatments. As shown in FIG. 2, the transfer device 10 includes a transfer frame (hereinafter, simply referred to as a frame) 14 made of, for example, a metal square steel member 14a. The frame 14 has wheels 16 at its bottom, and is capable of self-running by a wheel driving device 18 mounted in the frame 14. The wheel drive device 18
Is composed of, for example, a motor 18a, a gear box 18b, a chain 18c, etc., and drives the wheels 16 at a predetermined speed in a predetermined rotation direction. As shown in FIG. 3, rails 20 are arranged on the upper surface of a plurality of processing tanks A to K (in the present embodiment, 11 tanks are shown, but the number of processing tanks is appropriately increased or decreased according to the processing process). Thus, the transfer device 10 including the frame 14 can be moved between the processing tanks. In FIG. 2, one set of the wheel drive device 18 is prepared, and the power is transmitted to the axle 16a to show a one-side drive (front wheel drive). It may be a wheel drive, or each wheel 16 may have a wheel drive device 18.

The feature of this embodiment is that the transfer device 10
While moving along the rail 20, the hanger 12 on which the work W is placed is immersed in a predetermined processing tank, and when the hanger 12 is lifted up, the hanger 12 is swung by a predetermined angle.
The hanger 12 is swung in order to secure an optimal posture, and to immerse the processing solution or to run out of the processing solution smoothly, and by swinging the hanger 12 at an arbitrary timing. In addition, the line tact adjustment of the processing step is realized, and the variation of the processing method can be appropriately changed.

First, the configuration of the hanger 12 on which the work W is placed will be described. As shown in FIG.
4 has a hanger lifting hoist 22 on its upper beam. The hanger elevating hoist 22 has a hanger hook 24, and has a hook 24a at the tip as shown in FIG. This hook 24a is attached to the hanger 1
The swing shaft 26 (protruding on both sides of the hanger 12) serving as the swing center of 2 can be openably supported. Therefore, when transporting the hanger 12 or swinging the hanger 12, the hook 24 a supports the swing shaft 26. When the work W is left in the treatment tank or when the work W is reloaded, the hook 24a releases the swing shaft 26 and separates the hanger 12 from the transfer device 10. In addition, when the electric power required for performing the electrodeposition coating on the work W is supplied, the hanger hook 24 and the hook 24a are used.
The power is supplied to the swing shaft 26 via the swing shaft 26 and the power is supplied to the work W via the swing shaft 26 and the hanger 12.
Further, the work W may be directly fixed to the hanger 12 with a fastening member such as a bolt or a nut, or the work W may be once fixed to a pallet for transport outside the processing step with a fastening member. The pallet may be fixed to the hanger 12. Further, the number of works W placed on the hanger 12 is arbitrary, and may be one or more.

As shown in FIG. 4, the swing shaft 26 has a sprocket 28, and the sprocket 28 is formed by a pair of endless rack rollers (swing means) 30 having a plurality of rollers 30a on the outer peripheral surface. (Fig. 4
, The rack roller 30 is simplified in the drawing). The shape of the rack roller 30 is maintained by a substantially elliptical side arm 32. The rack roller 30 is supported on the outer periphery of the side arm 32 by a rack driving device 34 including a motor 34a, a gear box 34b, a chain 34c, and the like so as to be capable of normal rotation and reverse rotation. By rotating the pair of rack rollers 30 in directions opposite to each other, the sprocket 2
8, that is, the swing shaft 26 can be rotated in a predetermined direction at a predetermined position without moving up and down, and as a result, the hanger 12 can be rocked by a predetermined amount. As shown in FIG. 1, the rack driving device 34 can simultaneously drive the rack rollers 30 arranged on one side of the right and left sprockets 28 of the hanger 12 by the rack driving shaft 34d (the other side). The rack drive device 34 for driving the rack roller 30 is not shown in FIG. 1), and each rack roller 30 may have the rack drive device 34.

As shown in FIG. 1, a side arm 32 supporting the rack roller 30 is moved toward and away from the sprocket 28 on a side arm lifter 36 formed of a metal steel (frame 14). (Moving direction). That is, the side arm 32 is slidably supported on the side arm lifter 36, and the slide movement is performed by, for example, the reciprocating operation of the rod of the cylinder 38. For example, when the rod of the cylinder 38 performs the extension operation, the side arm 32, that is, the pair of rack rollers 30 separates from each other and separates from the sprocket 28. As a result, the turning power from the rack roller 30 to the sprocket 28 is shut off, and the sprocket 28, that is, the hanger 12 is released.
2 can be released. At this time, it is necessary to remove the hook 24a from the swing shaft 26. Conversely, when the rod of the cylinder 38 performs the compressing operation, the side arm 32, that is, the pair of rack rollers 30, approaches each other and sandwiches the sprocket 28, that is, the hanger 12.
As a result, the rotational power of the rack roller 30 is
8 to the swing shaft 26 and the hanger 1
2 and the swing angle of the hanger 12 can be fixed at a desired swing position. In this case, it is desirable that the swing shaft 26 be supported by the hook 24a. As a result, the swing of the hanger 12 can be performed stably. In the present embodiment, the pair of side arms 32 is shown as an example in which the two cylinders 38 move toward and away from each other, but the number is arbitrary as long as the movement can be smoothly performed.

The side arm lifter 36 can be moved up and down with respect to the frame 14 by a lifter driving device 40 composed of a motor 40a, a gear box 40b, a chain 40c and the like. In the case of the present embodiment, the side arm lifter 36 is vertically moved up and down by four chains 42 that operate in conjunction with each other by a gear 40d driven by the lifter driving device 40. In order to smoothly move up and down the side arm lifter 36 and reduce the load on the lifter driving device 40, each chain 42
Is connected to a counter weight 44 at one end.
If the side arm lifter 36 is moved up and down with the rack roller 30 sandwiching the sprocket 28, the hanger 12 is also moved up and down in conjunction with it. Therefore, the hanger elevating hoist 22 for elevating and lowering the hanger hook 24 is operated in conjunction with the driving of the lifter driving device 40.

In FIG. 1, sprockets 28 are formed on both sides of the hanger 12, and a pair of rack rollers 30 is arranged for each sprocket 28. On the side arm lifter 36, a rack driving device 34 for driving each rack roller 30 is arranged.

An image of the lifting / lowering operation of the hanger 12 of the transport device 10 configured as described above will be described with reference to FIG. In FIG. 5, details of the structure are omitted. FIG. 5A shows a state in which the transfer device 10 places a work W (not shown) on the hanger 12 and moves between a plurality of processing tanks. As described above, the rails 20 are arranged along the processing tank, and the transfer device 10 moves along the rails 20. In FIG. 5A, the transfer device 10 moves in a direction perpendicular to the paper surface. In the moving state of FIG. 5A, the hanger 12 is in a state of being pulled up into the frame 14. Therefore, the side arm lifter 36 is also in a state of being pulled up. Even in this state, the posture of the hanger 12 can be fixed at an arbitrary inclination by rotating the rack roller 30 as necessary,
The swing operation of the hanger 12 can be performed.
The posture and swinging operation of the hanger 12 will be described later.

FIG. 5B shows a state in which the transfer device 10 has reached a predetermined processing tank and the hanger 12 has been put into the processing tank. In the case of FIG. 5B, the moving direction of the transport device 10 is the left-right direction on the paper. In the case of FIG. 5B, the hanger 12 is operated by operating the lifter driving device 40 and the hanger lifting hoist 22 to lower the side arm lifter 36 and the hanger hook 24.
Is immersed in the treatment liquid. Even in this state, by rotating the rack roller 30, the posture of the hanger 12 can be fixed at an arbitrary inclination, and the swing operation of the hanger 12 can be performed. In order to stably perform the raising / lowering operation and the swinging operation of the hanger 12, as shown in FIG. 5C, a hanger guide 46a is formed on the frame 14 so as to extend in a vertical direction. A hanger guide 46b extending vertically is also formed on the tank side. Each hanger guide 46a, 46b is a hanger 12
Plate members (only one side of the hanger guide 46b is shown in FIG. 4) so as to sandwich the swing shaft 26 of the hanger guide 46a and the hanger guide 4a.
The connecting portions 6b are designed so that they can be mutually spread and the swing shaft 26 can be smoothly delivered.

In FIG. 5B, if necessary, only the hanger 12 can be left in the processing tank. In other words, after the hanger 12 lands in the processing tank, the cylinder 38 is extended to release the pinch of the sprocket 28 by the pair of rack rollers 30, and
The lowering operation of the hanger hook 24 of the hanger elevating hoist 22 is continued to release the support of the swing shaft 26 by the hook 24a. Subsequently, the frame 14 is slightly
4a is moved to the non-open end side (to the left in FIG. 4). As a result, the hanger 12 is completely released from the transfer device 10 and can remain in the processing tank. The work hanger 1 may be attached to and detached from the transfer device 10 before and after the surface treatment, if necessary.
By detaching the work 2 from the transfer device 10, the work of attaching and detaching the work W can be easily performed. When the hanger 12 is left in the processing tank, the side arm lifter 36 and the hanger hook 24 may be raised while keeping the pair of rack rollers 30 apart. When the hanger 12 is to be lifted and conveyed again, the hanger 12 is moved to the sky with the pair of rack rollers 30 separated from each other, and the side arm lifter 36 and the hanger hook 2 are moved.
4 is lowered, the cylinder 38 is compressed, and the pair of rack rollers 30 are moved closer to each other to
8 may be pinched.

FIG. 5C shows a state in which the hanger 12 is raised, that is, a state viewed from the side (the same direction as FIG. 5B) in the same state as FIG. 5A. I have. Of course, even in the state of FIG. 5C, the posture of the hanger 12 can be fixed at an arbitrary angle or the swing operation of the hanger 12 can be performed by rotating the rack roller 30.

FIG. 6 shows an example of a swing pattern of the hanger 12. Reference symbol A indicates a state in which the transfer device 10 is horizontally moving in a single posture when moving between the processing tanks, and reference symbol B indicates a single posture after the transfer device 10 reaches a predetermined processing tank. Indicates a state where the hanger 12 is moving up and down (the hanger 12 is in a horizontal state). Reference numeral C indicates that the transfer device 10 swings when moving between the processing tanks, and
It shows a state of being inclined by 0 °. Further, the reference D indicates a state in which the transport device 10 reaches a predetermined processing tank with the hanger 12 swinging and tilting 90 ° from the horizontal state, and ascending and descending in a single posture (90 ° tilt). Is shown. The code E is
This shows a state in which the hanger 12 moves between the processing tanks while further swinging by 90 ° or more. Also, the code F
After the transport device 10 reaches a predetermined processing tank, the hanger 1
2 shows a state in which charging and pulling into the processing tank are performed while rocking. Reference sign G indicates a state in which the transfer device 10 moves in a single posture (a state in which the state of reference sign A is inverted by 180 °) when the transfer apparatus 10 moves between the processing tanks, similarly to the reference sign A. Further, symbols H and I
Indicates a state in which the hanger 12 is swinging in the processing tank, and reference numeral J indicates a state in which the hanger 12 is swinging above the processing tank.

As described above, in the present embodiment, the posture of the hanger 12 can be fixed at an arbitrary angle or the hanger 12 can be continuously swung during the transportation of the hanger 12 between the processing tanks and the elevating to the processing tank. It is possible to perform a dynamic operation. As a result, during the transfer between the processing tanks, a posture that minimizes the resistance of the processing liquid when the work W is introduced into the processing tank or a posture in which no air layer remains in the internal space of the work W, for example, The opening can be inserted with the opening directed obliquely upward. Then, since the posture can be completed during the transfer between the processing tanks, the work W can be lowered immediately after the work W reaches the processing tank, thereby shortening the processing line tact. And adjustment can be easily performed. Further, when the work W is pulled out of the processing bath, the work liquid can be easily pulled up in a posture in which the processing liquid is not drawn out, for example, a posture in which the opening of the work W is directed obliquely downward. This posture can also be completed during the lifting operation of the work W.
Further, when the processing liquid is applied to the work W, the remaining state of the processing liquid (the wet state of the processing liquid) is specified for each type of the work W in order to prevent the coating unevenness. It is preferable that the condition can be selected for each work W. In the present embodiment, the hanger 12 can be changed to a desired posture during the lifting operation of the work W, and can be swung when moving between the processing tanks. The degree of cutting can be adjusted. Further, even when the shape of the workpiece W is complicated and it takes time to immerse the processing liquid, good immersion can be quickly performed by swinging the hanger 12 in the processing tank. At this time, the processing liquid can be stirred together, so that the processing efficiency can be improved. The posture and swing of the hanger 12 can be appropriately selected or combined depending on the contents of the processing steps.

By the way, the transport device 10 must sequentially move the processing tank group and return to the beginning of the processing step after completing a series of processing. Normally, when the transfer device 10 is turned back, it is necessary to form a round trajectory. In this case, a return trajectory in which the transfer device 10 moves in an unprocessed state is required outside the processing tank group. The space required for the process increases, which is not preferable in terms of equipment configuration. In the present embodiment, as described above, the hanger 12 can be left in the processing tank. Therefore, as shown in FIG. 3, after the transfer device 10 (M 1) transfers the work W to the processing tanks A to D while performing the surface treatment on the work W, the processing tank D is kept mounted on the hanger 12.
And return to the first processing tank A side. The returned transport device 10 (M1) lifts another hanger 12 on which the new work W is mounted, transports the section P of the processing tanks A to D, and sequentially immerses the new work W in the processing tank group. To reciprocate. On the other hand, the workpiece W left in the processing tank D is transported by the transfer device 10 (M
According to 2), the processing is performed while moving up in the section Q between the processing tanks D to G, and the processing tank G is left again.
Thereafter, the processing tanks G to G are similarly lifted up by the transport device 10 (M3 and M4) which reciprocates sequentially in the section R and the section S.
Move I and J-K. As a result, it is possible to construct a processing step on one line without hindering the movement of the work W and without providing a return path for the transfer device 10 outside the processing tank group. If a tank that requires a relatively long processing time is selected as a processing tank to which the hanger 12 is delivered, the hanger 12 can be transferred without breaking the entire line balance.
Can be taken over. In addition, hanger 12
Variations in transfer of the hanger 12 such as swinging and handover of the hanger 12 can be selected abundantly, so even when the processing speed differs between processing tanks, the entire line balance can be easily adjusted by combining the transfer variations. Will be possible.

The line configuration and the surface treatment contents described in the present embodiment are merely examples. If the work W moves sequentially in a continuous treatment tank, it can be arbitrarily selected according to the form of the work and the purpose of the surface treatment. The same effect can be obtained with other line configurations. In addition, regarding the configuration of the transfer device 10 shown in FIG.
8 has a pair of rotation drive mechanisms for holding the
As long as the hanger 12 can be pinched and released while allowing the swinging motion, the same effect can be obtained even if the driving mode and the details of the structure are changed.

[0035]

As described above, according to the transport mechanism of the present invention, since the hanger is sandwiched by the pair of swinging means, the structure for swinging is simple, and the hanger swings smoothly. Action can be performed. Further, the hanger can be rotated at an arbitrary timing, for example, while moving between the surface treatment tanks or while the hanger is immersed or pulled up in the surface treatment tanks. In addition, since the hanger can be opened in the surface treatment tank because it is sandwiched by a pair of swinging means that can freely contact and separate from each other, if necessary, only the hanger on which the work is mounted is left in the surface treatment tank, and the transfer device is used for other purposes. Can be transported to the hanger. As a result, the swing timing of the hanger and the selection of the transfer target can be easily performed, and the line tact of the process can be easily adjusted.

[Brief description of the drawings]

FIG. 1 is a perspective view illustrating the overall configuration of a transport device according to an embodiment of the present invention.

FIG. 2 is a partial configuration perspective view illustrating a frame and a hanger portion of the transport device according to the embodiment of the present invention.

FIG. 3 is an explanatory diagram illustrating a state in which the transfer device of the embodiment according to the present invention moves between processing tanks in which a plurality of processing tanks are arranged.

FIG. 4 is a partial configuration explanatory view illustrating a rack roller portion of the transport device according to the embodiment of the present invention.

FIG. 5 is an explanatory diagram illustrating a hanger elevating operation of the transport device of the embodiment according to the present invention.

FIG. 6 is an explanatory diagram illustrating a hanger swing operation of the transport device according to the embodiment of the present invention.

[Explanation of symbols]

10 transport device, 12 hangers, 14 frames, 1
6 wheels, 18 wheel drive, 20 rails, 22
Hanger lifting hoist, 24 Hanger hook, 26
Swing shaft, 28 sprockets, 30 rack rollers, 3
2 Side arm, 34 rack drive, 36 side arm lifter, 38 cylinder, 40 lifter drive, 42 chain, 44 counterweight.

Claims (6)

[Claims] An apparatus for transporting an object to be treated, which moves between a plurality of arranged surface treatment tanks while performing surface treatment on the object to be treated, wherein the apparatus is capable of freely moving between the surface treatment tanks. A transfer frame, a lifter disposed in the transfer frame and immersed in the surface treatment tank, and a hanger detachably supported by the lifter, the supporter fixedly supports the object to be surface-treated and transfers the object. A hanger that is swingable about a swing axis that is substantially perpendicular to the moving direction of the frame, and a pair of swing means that are arranged with the swing axis interposed therebetween and that rotates the swing axis by a predetermined angle. A device for conveying a surface-treated object, characterized in that it includes: 2. The transfer device according to claim 1, wherein the swing shaft of the hanger has a sprocket, and the swing means is constituted by a rack roller that can mesh with the sprocket. Device for transporting the surface treatment object. 3. The conveying device according to claim 1, wherein the swinging units are capable of coming into contact with and separating from a swinging shaft. 4. The transfer device according to claim 1, wherein the hanger is supported by a hanger hook provided on the lifter when swinging. Equipment for transporting processed objects. 5. The transfer apparatus according to claim 1, wherein the swinging means is capable of fixing a swinging angle of the hanger to an arbitrary angle. Equipment for transporting goods. 6. A surface treatment method using the transfer device according to claim 1, wherein a predetermined surface downstream of a treatment tank group formed by a plurality of arranged surface treatment tanks. Conveying the surface treatment object while performing the surface treatment to the treatment tank, releasing the hanger from the lifter in the predetermined surface treatment tank, and immersing the surface treatment object in the predetermined surface treatment tank together with the hanger, Returning the conveying device with the hanger released to the upstream side of the processing tank group, pulling up the hanger on which the subsequent surface-treated object is mounted, and conveying it downstream while performing the surface treatment, and in the predetermined surface processing tank. The hanger on which the object to be surface-treated which has been immersed and left is placed, is lifted up by a different transporting device in which the hanger returned from the downstream side of the processing tank group is released, and the surface-treated object is surface-treated to a predetermined surface treatment tank on the downstream side. Transporting the surface-treated object from the upstream side to the downstream side of the group of processing tanks while transferring hangers by sequentially using different transfer devices between predetermined processing tanks. A surface treatment method using a transport device.